一、Spring Data？

Spring Data是?個?于簡化數(shù)據(jù)庫訪問，并?持云服務(wù)的開源框架。其主要?標(biāo)是使得對數(shù)據(jù)的訪問變
得?便快捷，并?持map-reduce框架和云計算數(shù)據(jù)服務(wù)。 Spring Data可以極?的簡化JPA的寫法，可
以在?乎不?寫實現(xiàn)的情況下，實現(xiàn)對數(shù)據(jù)的訪問和操作。除了CRUD外，還包括如分頁、排序等?些
常?的功能。官網(wǎng)入口：
Spring Data的官?

Spring Data常?的功能模塊如下：

二、Spring Data ElasticSearch

Spring Data ElasticSearch 基于 spring data API 簡化 elasticSearch操作，將原始操作elasticSearch的客
戶端API 進(jìn)?封裝 。Spring Data為Elasticsearch項?提供集成搜索引擎。Spring Data Elasticsearch
POJO的關(guān)鍵功能區(qū)域為中?的模型與Elastichsearch交互?檔和輕松地編寫?個存儲庫數(shù)據(jù)訪問層。
官網(wǎng)入口：
官??站

三、?門案例

1）導(dǎo)?Spring Data ElasticSearch坐標(biāo)

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.alisinngai</groupId>
    <artifactId>es_demo2</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>es_demo2</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2）啟動器配置?件

package com.alisinngai.dv;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class EsDemo2Application {

    public static void main(String[] args) {
        SpringApplication.run(EsDemo2Application.class, args);
    }

}

# 配置文件
spring:
  data:
    elasticsearch:
      cluster-name: my-elasticsearch
      cluster-nodes: 127.0.0.1:9300

3) 編寫實體Article

package com.alisinngai.dv.domain;

import lombok.Data;
import lombok.EqualsAndHashCode;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;



@Data
@Document(indexName = "es_blog",type = "article")
@EqualsAndHashCode
public class Article {
    @Id
    @Field(type = FieldType.Long,store = true)
    private long id;
    @Field(type = FieldType.Text,store = true,analyzer = "ik_smart")
    private String title;
    @Field(type = FieldType.Text,store = true,analyzer = "ik_smart")
    private String content;

}

4）編寫Dao

?法命名規(guī)則查詢的基本語法findBy + 屬性 + 關(guān)鍵詞 + 連接符
文章來源地址http://www.zghlxwxcb.cn/news/detail-418619.html

package com.alisinngai.dv.repositories;

import com.alisinngai.dv.domain.Article;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.repository.ElasticsearchCrudRepository;

import java.util.List;

public interface ArticleRepository extends ElasticsearchCrudRepository<Article,Long> {
//    ?法命名規(guī)則查詢的基本語法findBy + 屬性 + 關(guān)鍵詞 + 連接符(屬性 + 關(guān)鍵詞 + 連接符)

    List<Article> findByTitleOrContent(String title,String content);

    List<Article> findByTitle(String title);

    List<Article> findByTitleOrContent(String title, String content, Pageable pageable);

    List<Article> findByTitleLike(String title);
}

6）創(chuàng)建測試類

package com.alisinngai.dv;

import com.alisinngai.dv.domain.Article;
import com.alisinngai.dv.repositories.ArticleRepository;
import org.elasticsearch.index.query.QueryBuilders;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.test.context.junit4.SpringRunner;

import javax.swing.*;
import java.io.Reader;
import java.util.List;

@SpringBootTest
@RunWith(SpringRunner.class)
public class EsDemo2ApplicationTests {

    @Autowired
    private ArticleRepository articleRepository;
    @Autowired
    private ElasticsearchTemplate template;

    @Test
    public void contextLoads() {
    }

    @Test
    public void createIndex() throws Exception {
        //配置映射關(guān)系
        template.putMapping(Article.class);
        //創(chuàng)建索引，并配置映射關(guān)系
        template.createIndex(Article.class);
    }

    @Test
    public void deleteIndex() {
        template.deleteIndex("es_blog");
    }



	//添加測試數(shù)據(jù)
    @Test
    public void addDocument() throws Exception {
        for (int i = 0; i < 100; i++) {
            //創(chuàng)建對象
            Article article = new Article();
            article.setId(i+1);
            article.setTitle("女護(hù)士路遇昏迷男子跪地?fù)尵龋?救人是職責(zé)更是本能" + i);
            article.setContent("這是一個美麗的女護(hù)士妹妹 " + i);
            //把文檔寫入索引庫
            articleRepository.save(article);
        }
    }

    @Test
    public void deleteById(){
        articleRepository.deleteById(4L);
    }

    @Test
    public void findAll(){
        Iterable<Article> all = articleRepository.findAll();
        all.forEach(System.out :: println);
    }


    /***
     * 關(guān)鍵字中有l(wèi)ike則表示分詞，否則不分詞，列如：
     * findByTitleLike()   :   分詞
     * findByTitle()       :   不分詞
     */

    @Test
    public void findByTitle(){
        List<Article> list = articleRepository.findByTitle("女護(hù)士");
        list.forEach(System.out :: println);
    }
    
    @Test
    public void findByTitleLike(){
        List<Article> list = articleRepository.findByTitleLike("美麗的女護(hù)士");
        list.forEach(System.out :: println);
    }

    @Test
    public void findByTitleOrContent(){
        List<Article> byTitleOrContent = articleRepository.findByTitleOrContent("女護(hù)士", "女護(hù)士");
        byTitleOrContent.forEach(System.out :: println);
    }

    @Test
    public void findByTitleOrContentPage(){
        PageRequest of = PageRequest.of(0, 10);
        List<Article> list = articleRepository.findByTitleOrContent("女護(hù)士", "女護(hù)士", of);
        list.forEach(System.out :: println);
    }


    //原生的dsl語句
    @Test
    public void testNativeSearchQuery(){
        NativeSearchQuery nativeSearchQuery = new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.queryStringQuery("女護(hù)士").defaultField("title"))
                .withPageable(PageRequest.of(0, 15))
                .build();
        List<Article> list = template.queryForList(nativeSearchQuery, Article.class);
        list.forEach(res -> System.out.println(res));

    }
}

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